This adds automatic network configuration based on detected hardware:
- networking/default.nix: Auto-configure DHCP on physical interfaces
Detects Ethernet, WLAN, USB-Link, and generic network interfaces,
automatically enabling DHCP on each. Excludes loopback and mainframe
interfaces. Sets networking.useDHCP and per-interface useDHCP.
- networking/intel.nix: Intel WiFi firmware detection
Auto-enables firmware for Intel 2200BG and 3945ABG wireless cards
based on PCI vendor/device IDs.
- networking/initrd.nix: Network drivers in initrd
Loads network controller drivers when boot.initrd.network.enable
is set, enabling network boot scenarios.
Builds on PR #454847 (boot & storage).
Part of incremental upstreaming from nixos-facter-modules.
